What question did this study set out to answer?

To overcome trade-offs among sensing bandwidth, sensitivity, and spatial resolution in phase-sensitive optical time-domain reflectometry by developing a linearized pulse-coding scheme.

September 21, 2018IEEE Internet of Things Journal

Distributed Acoustic Sensing Based on Pulse-Coding Phase-Sensitive OTDR

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To overcome trade-offs among sensing bandwidth, sensitivity, and spatial resolution in phase-sensitive optical time-domain reflectometry by developing a linearized pulse-coding scheme.
Formulated a theoretical framework to establish an intensity-coded, phase-retrieved heterodyne optical time-domain reflectometry setup as a fully linear system.
Implemented Golay pulse-coding to boost the signal-to-noise ratio while maintaining a sensing bandwidth matching a four-times averaging configuration.
Conducted a proof-of-concept experiment on a 10 km optical fiber cable to evaluate spatial resolution and sensitivity.
Significantly enhanced the signal-to-noise ratio while preserving a sensing bandwidth equal to four-times averaging.
Demonstrated submeter gauge length and nanostrain resolution over a 10 km sensing range, establishing more than 10,000 distinct sensing units along the fiber.

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Implication

Experimental study demonstrates enhanced signal-to-noise ratio and submeter resolution across a 10-kilometer fiber, suggesting viable large-scale distributed acoustic sensor networks.

Cite This Study

Wang et al. (2018) studied this question.

synapsesocial.com/papers/6a9198df6587792532464be4 https://doi.org/10.1109/jiot.2018.2869474

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Implication

Experimental study demonstrates enhanced signal-to-noise ratio and submeter resolution across a 10-kilometer fiber, suggesting viable large-scale distributed acoustic sensor networks.

Distributed Acoustic Sensing Based on Pulse-Coding Phase-Sensitive OTDR

Key Points

Discussion

Implication

Cite This Study

Distributed Acoustic Sensing Based on Pulse-Coding Phase-Sensitive OTDR

Key Points

Discussion

Implication

Cite This Study

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